Presented September/12/2001 at Powersystems World 2001 Conference in Chicago, USA – In this paper we propose transformer-based solutions to several power quality problems. Elsewhere we have shown how to solve the acoustical noise emission problems. In this paper we introduce toroidal transformers with reduced inrush currents, transformers with reduced electromagnetic emissions, and other transformers useful to reduce the transfer of harmonics.
With the low-inrush transformers we are able of eliminating (or reducing) voltage sags and nuisance service interruptions caused by false operation of breakers and fuses. The low-stray emissions transformers are used for reducing the electromagnetic interference (EMI) caused by stray fields emitted from the transformer. Electromagnetic noise reduction transformers (NRT) are used reduce the harmonic pollution problem.